Posters

Comparison of the management of corneal ectasia with two different laser platforms followed by corneal cross-linking (CXL) in patients with keratoconus

Poster Details

First Author: I.Aslanides GREECE

Co Author(s): I. Maragkos   V. Selimis   S. Voulgaraki              

Abstract Details

Purpose:

We report the comparative 12 months results of excimer laser treatment using two different techniques. The two modalities were corneal wavefront All Surface Laser Ablation (ASLA/TransPRK) (Schwind Amaris, (Schwind eye-tech-solutions GmbH, Kleinostheim, Germany) and Central Corneal Regularization (CCR) (iVIS Technology, Taranto, Italy) prior to accelerated CXL

Setting:

Emmetropia Eye Institute, Heraklion, Crete, Greece

Methods:

Corneal wavefront ASLA and Central Corneal Regularization was performed on twenty-six (26) twenty-four (24) eyes of fifty (50) keratoconic patients using the Schwind Amaris 750S (Schwind eye-tech-solutions GmbH, Kleinostheim, Germany) or the iRES laser platform (iVIS Technology, Taranto, Italy) respectively. The treatment was combined with corneal cross-linking (CXL) of standard energy (5.4 J/cm2) using the Avedro’s KXL system (Avedro Inc., Waltham, MA, USA). For the corneal wavefront the data used were acquired using the Keratron Scout (Optikon, Rome, Italy) whereas for the CCR, high definition corneal elevation maps were acquired with a PrecisioHD tomographer (iVIS Technology, Taranto, Italy).

Results:

Overall, both approaches had promising results with no statistically significant differences. No eyes lost any line of best corrected visual acuity. In terms of safety, in both groups 15% and 16% of patients, respectively, had no change in their CDVA while the rest 85% and 84% gained at least one Snellen line. In addition, 65% and 63.5% of the patients in each group had a post-operative refractive astigmatism ranging from 0.00 D to -1.00D while pre-operatively only 8.5% and 8% of them fitted in that. Moreover, Kmax had an average reduction of 2.73D and 2.68D respectively

Conclusions:

Both corneal wavefront ASLA and CCR create a more regular corneal surface by reducing the elevation of the cone and smoothening the overall corneal surface. As a conclusion, corneal wavefront treatment, focused on higher order aberrations, or creating a relatively small optical zone with a big transition zone seems to offer a very good corneal smoothness that leads to very good results in terms of CDVA while the CXL treatment halts the progression of keratoconus

Financial Disclosure:

None